RomRaider

Until I'm dead, or you find someone better.

But thanks. Although you might want to save that until after I succeed in following through with the testing.

Nice.

So, even people with single scroll turbos can relocate their front O2 sensor to the JDM location and rescale their front O2 sensors according to Jon's chart.

The only problem that I see is that there are more joints that allow a higher probability of a leak which might affect idle. I see a lot of small leaks at the uppipe to turbo and even at the turbo to downpipe (these are stock cars).

Really? Subaru is shipping from the factory cars with exhaust leaks?

Haha. Funny guy.

Yeah, it's fairly common for the LGT stock downpipe to turbo to leak. I saw it on mine when I swapped out my downpipe (tell tale ash marks). unclemat was missing a bolt and I think whitetiger made a similar comment about his experiences swapping downpipes. I think it's one mechanic at the factory not properly tightening them.

root,
I forgot to ask - how was your idle? Any issues or weirdness?

No weirdness to report. I have raised my idle slightly, but I attribute that to a large MAF housing and not the relocation of the O2 sensor.

A larger MAF housing should not affect idle if it's scaled correctly. Raising the idle speed would reduce loping if it were due to relocating your front AFR sensor.

I also have larger injectors. It isn't uncommon for folks with larger injectors and larger MAF housing to experience idle fluctuations even with stock location AFR sensors. I experienced that even when my AFR was in stock location. I experienced it after it was moved. I'm not currently inclined to assume it is a sensor relocation issue. We aren't talking about huge swings.

Why would you attribute it to moving the sensor vs. larger MAF and injectors?

Yes, both ends of my crosspipe. Tolerances, who knows. I doubled up the stock gaskets on both sides to stop it.

Got my car running again and did a really quick log. I changed my settings to this:



And the result was this:



Obviously, the logger is still not reading below 11:1. This was with the StreetTuner logger since the RomRaider logger LM-1 support isn't quite working yet. I don't suppose that should matter unless the RomRaider logger would somehow getting the value differently.

Any ideas? Am I missing a setting in some other table? Or have we been beaten and should just let this go to bed?

I would assume it's a table, not the sensor, a wall like that is strange. It would be nice to know, I've got my 3rd dead LC-1 .

I was thinking the same thing. Especially when the wall happens to occur at a "human" round number like 11.

It think the ECU is sensing the sensor's current with a shunt transistor which produces a voltage proportional to the current. Then it uses a table to convert that voltage to a current. And finally, it uses another table (the one shown above) to convert current to lambda/AFR. If the voltage-to-current table has the same amperage axis values as the stock current-to-lambda/AFR table, then that graph is what I'd expect to see.

Here's a way (I hope) to monitor the voltage associated with the front AFR sensor to see whether it continues to move even after the reported AFR is pegged at 11:1. The Logworks OpenPort plugin includes support for logging some OBD-II realtime parameters. I've added (I think) support for PID $24 based on information at http://en.wikipedia.org/wiki/OBD-II_PIDs. All Subaru turbo ECUs support that PID. Naturally, you must also log an LM-1 or LC-1 at the same time, or the Logworks logger won't work. I suspect the sample frequency from OBD-II will be pretty slow, though.

To do the test, you'd need to rename the file protocols.xml in the Logworks directory and then upload the attached file in its place.

Only works on OpenPort < 1.3 AFAIK

It should work with OpenPort 1.3. Maybe you weren't trying to also log an Innovative product at the same time? If you weren't, then the Logworks logger won't work, according to Klaus Allmendinger (Innovative's chief engineering honcho) in this post: http://www.innovatemotorsports.com/forums/showpost.php?p=31941&postcount=8. If your OpenPort 1.3 didn't work and you were also logging an LM-1 or LC-1, then I suggest you register at Innovative's forums and revive that thread to report the problem.